Precision Topcon

GPS Surveying unit... What would you recommend ?

What GPS unit for surveying would you recommend; It is basically for horizontal shots for layouts of fields, but elevations as a bonus would be welcome.

I'm trying to get a basic cost range as well as a recommended model and/or brand for a GPS unit for my employer.

Its been a while since I've done survey-grade GPS work. There aren't many to choose from. The biggest brands are Trimble/Spectra Precision, Topcon/Javad, Ashtech (actually, whoever acquired them), and Leica.

Based on what you described, you want an RTK (real-time kinematic system). A basic RTK system will consist of 2 gps receivers (one as a base and one as a rover) and a radio connection between them to transmit base station data. Usually these systems are on the order of tens of thousands of dollars.

Are you using some kind of data collector with your conventional surveying equipment?? If so, then you want to get a GPS system that will integrate easily with whatever data collector you're using (most of them do).

Hope that helps.

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